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Title: Reactor component automatic grapple

Abstract

A grapple for handling nuclear reactor components in a medium such as liquid sodium which, upon proper seating and alignment of the grapple with the component as sensed by a mechanical logic integral to the grapple, automatically seizes the component. The mechanical logic system also precludes seizure in the absence of proper seating and alignment.

Inventors:
Publication Date:
OSTI Identifier:
6533879
Patent Number(s):
US 4362692
Assignee:
Dept. of Energy ERA-08-020595; EDB-83-057567
Resource Type:
Patent
Resource Relation:
Patent File Date: Filed date 3 Nov 1980; Other Information: PAT-APPL-203307
Country of Publication:
United States
Language:
English
Subject:
22 GENERAL STUDIES OF NUCLEAR REACTORS; MATERIALS HANDLING EQUIPMENT; DESIGN; REACTORS; FUEL ASSEMBLIES; GRABS; HOISTS; EQUIPMENT; 220200* - Nuclear Reactor Technology- Components & Accessories; 220900 - Nuclear Reactor Technology- Reactor Safety

Citation Formats

Greenaway, P.R. Reactor component automatic grapple. United States: N. p., 1982. Web.
Greenaway, P.R. Reactor component automatic grapple. United States.
Greenaway, P.R. 1982. "Reactor component automatic grapple". United States. doi:.
@article{osti_6533879,
title = {Reactor component automatic grapple},
author = {Greenaway, P.R.},
abstractNote = {A grapple for handling nuclear reactor components in a medium such as liquid sodium which, upon proper seating and alignment of the grapple with the component as sensed by a mechanical logic integral to the grapple, automatically seizes the component. The mechanical logic system also precludes seizure in the absence of proper seating and alignment.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = 1982,
month =
}
  • A grapple for handling nuclear reactor components in a medium such as liquid sodium which, upon proper seating and alignment of the grapple with the component as sensed by a mechanical logic integral to the grapple, automatically seizes the component. The mechanical logic system also precludes seizure in the absence of proper seating and alignment.
  • A grapple of a lifting apparatus consists of several clamps situated in a grapple box and capable of being moved one toward the other radially, operated by a common command apparatus; this grapple of the lifting apparatus is studied especially for the transport of nuclear reactor fuel elements, characterized by the fact that these clamps are preferably of the form of one arm pivoting on two arms. (TSS)
  • This patent describes a fuel handling system for nuclear reactor plants. It comprises: a reactor vessel having an openable top and removable cover and containing therein, submerged in water substantially filling the reactor vessel, a fuel core including a multiplicity of fuel bundles formed of groups of sealed tube elements enclosing fissionable fuel assembled into units, the fuel handling system consisting essentially of the combination of: a fuel bundle handling platform movable over the open top of the reactor vessel; a fuel bundle handling mast extendable downward from the platform with a lower end projecting into the open top reactormore » vessel to the fuel core submerged in water; a grapple head mounted on the lower end of the mast provided with grapple means comprising complementary hooks which pivot inward toward each other to securely grasp a bail handle of a nuclear reactor fuel bundle and pivot backward away from each other to release a bail handle; the grapple means having a hollow cylindrical support shaft fixed within the grapple head with hollow cylindrical sleeves rotatably mounted and fixed in longitudinal axial position on the support shaft and each sleeve having complementary hooks secured thereto whereby each hook pivots with the rotation of the sleeve secured thereto; and the hollow cylindrical support shaft being provided with complementary orifices on opposite sides of its hollow cylindrical and intermediate to the sleeves mounted thereon whereby the orifices on both sides of the hollow cylindrical support shaft are vertically aligned providing a direct in-line optical viewing path downward there-through and a remote operator positioned above the grapple means can observe from overhead the area immediately below the grapple hooks.« less
  • This patent describes an improved reactor internals lifting rig including a reactor internals through-hole grapple device for lifting and transporting an internals structure of a nuclear reactor, the internals structure including a radial flange thereon having a top and bottom surface with a plurality of holes therebetween. It comprises: a generally vertically disposed cylindrical housing adapted to be secured to the lifting rig; a generally vertically oriented grapple assembly having its upper end partially disposed within the housing and the lower and projecting substantially below the housing and the lifting rig; the lower end of the grapple assembly having anmore » outwardly directed annular shoulder with an upper surface thereon which is adapted to pass through one of the holes and adjacent to the bottom surface of the radial flange, the grapple assembly having a retracted position and an expanded position wherein when in the retracted position the annular shoulder is smaller in diameter than the hole and when in the expanded position the annular shoulder is larger in diameter than the hole such that the upper surface of the annular shoulder is in abutting contact with the bottom surface of the radial flange of the internals structure.« less